01374nas a2200253   4500008004100000022001400041245010500055210006900160260007700229300001400306490000700320520041200327653002800739653001900767653002100786653003100807653002700838100001900865700002300884700003000907700002900937700002400966856013000990       2015                        eng d  a1433-785100aSBA-15-oxynitrides as a solid-base catalyst: effect of nitridation temperature on catalytic activity0 aSBA15oxynitrides as a solidbase catalyst effect of nitridation t  aBOSCHSTRASSE 12, D-69469 WEINHEIM, GERMANYbWILEY-V C H VERLAG GMBHcMAY  a5985-59890 v543 a<p>Solid bases, such as SBA-15-oxynitrides, have attracted considerable interest for potential applications as catalysts in important industrial processes. Reported herein is that by simply tuning the temperature of nitridation (ammonolysis), the catalytic activity of these solid bases can be enhanced. Solid-state NMR spectroscopy and XPS studies provided the reasoning behind this change in activity.</p>10aheterogeneous catalysis10aNanostructures10aNMR spectroscopy10aphotoelectron spectroscopy10asolid-state structures1 aSingh, Baljeet1 aMote, Kaustubh, R.1 aGopinath, Chinnakonda, S.1 aMadhu, Perunthiruthy, K.1 aPolshettiwar, Vivek  uhttps://library.ncl.res.in/content/sba-15-oxynitrides-solid-base-catalyst-effect-nitridation-temperature-catalytic-activity-001919nas a2200193   4500008004100000022001400041245008900055210006900144260000800213300001600221490000800237520125000245100001401495700002301509700001901532700002901551700002501580856012001605       2021                        eng d  a1932-744700aPhotoactive anthraquinone-based host-guest assembly for long-lived charge separation0 aPhotoactive anthraquinonebased hostguest assembly for longlived   cMAY  a10891-109000 v1253 aPorous 2D covalent organic frameworks (COF) that are assembled axially through weak p-stacking interactions can provide reticular charge transport channels while playing host to kinetically stabilized reactive molecular redox states. Here we demonstrate a host-guest supramolecular charge transfer (CT) assembly using photoactive anthraquinone-based COF as an acceptor while incarcerating the electron donor N,N-dimethylaniline (DMA) inside it. Employing femtosecond broadband transient absorption spectroscopy in combination with electron paramagnetic resonance (EPR) studies, we show that the CT occurs rapidly within <110 fs after photoexcitation, subsequently leading to long-lived charge separation with 13% quantum efficiency at room temperature. The photoinduced EPR signature of the long-lived confined DMA cation radical confirms the disparate regions of charge localization while H-1-C-13 correlation experiments using solid-state NMR spectroscopy enumerate the packing of the amines inside the host-guest COF assembly. Our work demonstrates the potency of charge transport pathways in supramolecular assemblies for efficient charge separation which if optimally tuned should pave the way for COF-based photocatalytic reaction centers.1 aJha, Ajay1 aMote, Kaustubh, R.1 aChandra, Suman1 aMadhu, Perunthiruthy, K.1 aDasgupta, Jyotishman  uhttps://library.ncl.res.in/content/photoactive-anthraquinone-based-host-guest-assembly-long-lived-charge-separation